Available in: 7mm crystal x 6mm cap x 4mm stem 9mm crystal x 6mm cap x 7mm stem (Long) Colors: AB Rainbow, Clear, Black*, Blue*, Mixed (Mixed colors may vary between batches) * Black & Blue will be discontinued once sold out. TOOLS REQUIRED: Crystal rivet bottom die in the same size as the crystal rivets, AND Top die from the double cap rivet die set, purse feet die set, or magnetic snap rivet die set in any size. And one of the following presses: KX8J pro-handheld KX-T2 pro-standup press DK93 table press with DK93-KX adapter base ALSO RECOMMENDED: 2.5mm hole cutting dies